Title:
STEEL PIPE POSITIONING CONSTRUCTION METHOD BY PILE INSTALLATION BY INNER EXCAVATION
Document Type and Number:
Japanese Patent JP3170604
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To increase peripheral face friction force of a positioned steel pipe to improve vertical support force in steel pipe positioning by pile installation by inner excavation.
SOLUTION: In this pile installation by inner excavation in which a screw auger S is inserted into a steel pipe P, digged earth and sand are discharged upward through the steel pipe P while a vertical hole is digged in advance by a digging head at a lower end of the screw auger S due to the rotation of the screw auger S, and the steel pipe P is inserted into the vertical hole, solidifying liquid is injected onto an inner peripheral face of the vertical hole from a nozzle of the digging head at the same time with rotary digging of the screw auger S and the insertion of the steel pipe P to form a soft soil belt including the solidifying liquid along substantially spiral line on the inner peripheral face of the vertical hole by the injection and form a substantially spiral hard soil belt adhered firmly on an original ground and the steel pipe P due to its hardening after positioning of the steel pipe.
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| JPS5664018 | CONCRETE PILE |
| JP6278366 | Pile hole drilling controlling method |
Inventors:
Manabu Sano
Honma Nobuyoshi
Kazuo Yamazaki
Honma Nobuyoshi
Kazuo Yamazaki
Application Number:
JP20133999A
Publication Date:
May 28, 2001
Filing Date:
July 15, 1999
Export Citation:
Assignee:
Sano Gumi Co., Ltd.
Sato Enterprise Co., Ltd.
Sanwa Equipment Co., Ltd.
Sato Enterprise Co., Ltd.
Sanwa Equipment Co., Ltd.
International Classes:
E02D7/00; (IPC1-7): E02D7/00
Domestic Patent References:
| JP544412A | ||||
| JP5135502A | ||||
| JP6350484B2 |
Attorney, Agent or Firm:
Takefumi Tanaka (1 person outside)